Anand(Kamal Haasan) is a spoilt young man whose parents have died leaving behind a huge inheritance. He spends all his waking hours boozing and gambling with his buddies. One such night, he ends up in a brawl with some rowdies, but a stranger Selvam(Radharavi) comes to his rescue. Selvam beats up the rowdies and takes Anand back to his bungalow. A drunk Anand forces Selvam to spend the night in his house. However, the next day, he has no recollection of the previous night's events. His servant Mani(Janagaraj) and accountant Nagapillai(V. K. Ramasamy) come to Selvam's aid. In appreciation, Anand appoints Selvam as his Personal Assistant.
Captain Etienne Navarre is a man on whose shoulders lies a cruel curse. Punished for loving each other, Navarre must become a wolf by night whilst his lover, Lady Isabeau, takes the form of a hawk by day.
When a bumbling pair of employees at a medical supply warehouse accidentally release a deadly gas into the air, the vapors cause the dead to re-animate as they go on a rampage seeking their favorite food: brains!